Low gravity all-surface vehicle

ABSTRACT

Vehicles are disclosed which have a lower center of gravity than existing all-terrain, amphibious, and unmanned ground vehicles due to the location of propulsion units and other vehicle components inside the wheels of the vehicle. The vehicles can climb over large obstacles yet are also able to corner at high speeds. The vehicles can be configured for direct manual operation or operation by remote control, and can also be configured for a wide variety of missions.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a divisional of U.S. patent application Ser. No. 15/272,721, filed on Sep. 22, 2016, which is a continuation-in-part of U.S. patent application Ser. No. 14/674,764, filed Mar. 31, 2015, now U.S. Pat. No. 9,457,647, which claims the benefit of U.S. Provisional Patent Application No. 61/973,075 filed on Mar. 31, 2014, each of which are incorporated herein by reference in their entirety.

FIELD

The present disclosure relates generally to the field of ground and amphibious vehicles. More specifically, it relates to lowering the center of gravity of ground and amphibious vehicles, regardless of whether they are remotely operated, computer controlled or direct driven vehicles.

BACKGROUND

Known surface vehicles are useful and valuable to this day, but are limited in their use due to their inability to corner and travel at high speeds. As an example, a High Mobility Multipurpose Wheeled Vehicle commonly known as the Humvee, or a high clearance demonstration vehicle such as the Monster Truck, can climb over very large objects. However, both vehicles have the undesired tendency to flip over when cornering too quickly or when climbing an object that is too steep. This undesired effect is primarily caused by having the majority of each vehicle's weight, and therefore its center of gravity, well above the wheels. In contrast, an advanced race car, such as a Formula One race car, has its center of gravity close to the ground. As a result, it has the ability to corner at very high speeds. The body of a Formula One race car, however, is also very close to the ground. This prevents it from climbing over objects of even the smallest size, making it a ground vehicle that is ideal for high speed cornering, but not acceptable for climbing over objects as required by all-terrain vehicles.

The solution for combining both of these benefits is utilized in vehicles disclosed herein to great effect. Embodiments of the vehicles disclosed herein are capable of both cornering at high speeds and climbing large objects. The vehicles have this capability due to a dramatically lower center of gravity relative to traditional vehicles and in some cases, because they utilize very large wheels.

Prior art vehicles have been created with a low center of gravity and a single large wheel, but the use of only one wheel in these designs has created yet another dramatic limitation. When attempting to accelerate at high speeds or climb large objects, these single-wheel vehicles are susceptible to the motorized portion of their interior spinning off-axis, thus preventing the vehicle from operating at all. With a vehicle that has only one wheel, the axis or axle of the vehicle is not fixed on a plane. Gravity and weight alone keep the power unit from free-spinning inside the wheel. Due to this limitation, over-accelerating the vehicle can allow the insides of the vehicle to spin off-axis, such that the wheel and vehicle remain stationary while the insides of the vehicle spin. Embodiments of vehicles disclosed herein solve this problem by using more than one wheel to keep the axis and axles in-plane, thus allowing for rapid acceleration, high speed cornering and the ability to climb large objects.

SUMMARY

Embodiments of vehicles disclosed herein are designed for moving and cornering at high speeds as well as being able to climb large objects. Such vehicles also have the unique ability to prevent high centering, a problem common to most vehicles, including all-terrain vehicles. In some embodiments, the vehicles can move across the top of water like a boat (amphibious vehicle). As disclosed herein, these benefits are accomplished by moving the majority of the vehicle weight (engines, motors, batteries, cooling systems, electronics, etc.) below the level of the axle and even by moving some—or in some embodiments, almost all—vehicle components into the inside of the wheels themselves. By using more than one wheel, where the wheels do not all share the same axis, embodiments of the vehicles disclosed herein are capable of more rapid acceleration than was achieved by prior art vehicles using motors placed inside a single wheel.

Though embodiments of the vehicles disclosed herein are very difficult to flip over due to their low center of gravity and high clearance, the vehicles do not have a top or a bottom, or a front or a back. This makes the vehicles capable of flipping over and continuing on their path. It also allows for increased maneuverability, due to the fact that the controls can be reversed. By simply adjusting the individual speeds of the motors or engines in each wheel (like a tank), embodiments of the vehicles disclosed herein are capable of steering without the need for additional external moving parts. This allows the vehicles disclosed herein to be robust.

The present disclosure has benefits for all types of vehicles. Embodiments of the vehicles disclosed herein are suitable for a wide variety of applications, including but not limited to: full size tanks for military action, robots capable of climbing stairs at high speeds, amphibious remotely operated vehicles (ROVs) capable of high speed water and land operations, remote control toys, unmanned vehicles that are capable of carrying large supplies and weapons to a battlefield, and even off-road race vehicles.

In accordance with at least one embodiment, a vehicle is provided that generally comprises:

-   -   a frame comprising a plurality of axles having a plurality of         axes;     -   a plurality of wheels, each wheel rotatably connected to an axle         and defining an inner volume; and     -   a plurality of frame mounts, each frame mount positioned within         the inner volume of a wheel and connected to an axle, each frame         mount further having a portion extending below the axis of the         axle, which portion supports a propulsion unit drivingly coupled         to the wheel, an energy source, and a control unit;     -   wherein the center of gravity of the vehicle is below the         plurality of axes.

In some embodiments, each portion of the frame of the vehicle between two axles includes a pivot.

In some embodiments, the propulsion unit is at least one of a motor and an engine, the energy source is at least one of a battery and a fuel tank, and the control unit is at least one of an electronic speed control and a throttle.

In some embodiments, the vehicle also comprises a receiver configured to receive signals from a transmitter and to send corresponding signals to at least one of the control units.

In some embodiments, the vehicle is configured to change direction by at least one of varying the speed of a propulsion unit and changing the length of a linear actuator.

In some embodiments, the vehicle further comprises at least one of a waterproof material configured to prevent water from entering the inner volume of at least one of the plurality of wheels and features on the outer circumference of at least one of the plurality of wheels that enhance the propulsion of the vehicle on water.

In some embodiments, the vehicle further comprises a seat located within the inner volume of at least one of the plurality of wheels and configured to support a person below the axle to which the wheel is connected.

In accordance with at least another embodiment, a reconfigurable vehicle system is provided that generally comprises:

a plurality of self-contained wheels each rotatably connected to an axle, each wheel comprising:

-   -   a substantially cylindrical inner volume;     -   a mount connected to the axle and positioned within the inner         volume, each mount having a portion extending below the axle         that supports a propulsion unit drivingly coupled to the wheel,         an energy source, and a control unit;

wherein the axles of the plurality of self-contained wheels are detachably engageable to a frame.

In some embodiments, the reconfigurable vehicle system further comprises a semi-permeable membrane configured to prevent liquid from entering the inner volume.

In some embodiments, each mount of the reconfigurable vehicle system mount further supports a receiver adapted to receive signals from a transmitter and to send corresponding signals to the control unit.

In some embodiments, the reconfigurable vehicle system further comprises at least one of a frame adapted to maintain the plurality of self-contained wheels in substantial linear alignment and a frame adapted to maintain two of the plurality of self-contained in wheels in substantial axial alignment.

In some embodiments, the center of gravity of each self-contained wheel of the reconfigurable vehicle system is lower than the axle of each self-contained wheel.

In some embodiments, each mount of the reconfigurable vehicle system is selectively rotatable around the axle to which it is connected.

In some embodiments, the reconfigurable vehicle system further comprises a servo configured to partially rotate each mount around the axle to which it is connected.

In accordance with at least another embodiment, a vehicle system is provided that generally comprises:

a frame comprising a plurality of structural members and at least one joint, each structural member connecting to an axle that is rotatably connected to a wheel;

a propulsion device for driving the wheel;

an energy source; and

a control unit;

wherein the propulsion device, energy source, and control unit are suspended from the axle and positioned inside the wheel.

In some embodiments, the frame of the vehicle system holds two wheels along a single first axis and a third wheel along a second axis substantially parallel to the first axis. Further, in some embodiments the first axis is separated from the second axis by less than the average outermost diameter of the wheels.

In some embodiments, the frame of the vehicle system holds at least two wheels in linear alignment.

In some embodiments, the vehicle system further comprises a linear actuator configured to move two axles relative to each other.

In some embodiments, the vehicle system further comprises a seat suspended from at least one axle and adapted to support a person below the axle to which the seat is attached.

In accordance with another embodiment of the present disclosure, a vehicle comprises a frame and a plurality of self-contained motorized wheels, each wheel defining an inner volume and comprising an axle extending through the inner volume and having one end positioned outside of the inner volume, the one end attached to the frame; a propulsion unit supported within the inner volume by the axle and drivingly coupled to the wheel; and a frame mount positioned within the inner volume and connected to the axle, the frame mount having a portion extending below an axis of the axle, which portion supports a control unit and an energy source for powering the propulsion unit and the control unit. The center of gravity of the vehicle is below the axis of the axle thereof. A mounting bar may be attached to the frame, and at least one suspension element may be attached to the frame. The at least one suspension element may be operable to raise and lower the mounting bar. A sensor may be mounted on the frame of the vehicle.

A stretcher may be attached to the mounting bar. A first camera may be mounted to a forward portion of the vehicle and positioned to capture imagery of an area in front of the vehicle, and a second camera mounted above the stretcher and positioned to capture imagery of the stretcher.

Alternatively, a cargo rack may be attached to the mounting bar. A first camera may be mounted to a forward portion of the vehicle and positioned to capture imagery of an area in front of the vehicle, and a second camera may be mounted above the cargo rack and positioned to capture imagery of the cargo rack.

According to another embodiment of the present disclosure, a vehicle comprises a frame having a fore end and an aft end and defining an axis; a first cylindrical housing attached in a center portion thereof to the fore end of the frame and a second cylindrical housing attached in a center portion thereof to the aft end of the frame, the first and second cylindrical housings each defining an internal volume and having parallel axes that are perpendicular to the axis of the frame; a bearing mounted around a circumference of each cylindrical housing on each side of the frame; a wheel mounted on each bearing; and a drive plate connected to a drive socket and at least one wheel, and configured to transmit rotational force from the drive socket to the wheel. The internal volume of the first cylindrical housing comprises an energy source; a propulsion unit drivingly couple to the drive socket, which extends through at least one end of the first cylindrical housing; and a control unit.

Each cylindrical housing may comprise an access panel. The internal volume of the second cylindrical housing may comprise a second energy source; a second propulsion unit drivingly coupled to a second drive socket extending through at least one end of the second cylindrical housing; and a second control unit. A drive socket may extend through each end of each cylindrical housing. Each of the first and second cylindrical housings may be pivotably attached to the frame.

According to still another embodiment of the present disclosure, a self-contained motorized wheel comprises an axle extending through an inner volume of the self-contained wheel and having one end positioned outside of the inner volume; a propulsion unit drivingly coupled to the wheel; and a frame mount positioned within the inner volume and connected to the axle, the frame mount having a portion extending below an axis of the axle, which portion supports a control unit, a receiver, and a plurality of energy sources for powering the propulsion unit, control unit, and the receiver. The receiver receives wireless signals for controlling propulsion unit via the control unit, and the center of gravity of the wheel is below an axis of rotation of the wheel.

The propulsion unit may be a hub motor mounted around the axle. Alternatively, the propulsion unit may be a motor mounted above the axle. The plurality of energy sources may be a plurality of batteries, and the plurality of batteries may have more mass than the propulsion unit. The one end of the axle may be attached to a frame.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is described in conjunction with the appended figures, which are not necessarily drawn to scale:

FIG. 1 is an isometric view of an embodiment of the present disclosure;

FIG. 2 is another isometric view of the embodiment of FIG. 1;

FIG. 3 is a side view of the embodiment of FIG. 1;

FIG. 4 is a back view of the embodiment of FIG. 1;

FIG. 5 is a top view of the embodiment of FIG. 1;

FIG. 6 is an isometric view of the embodiment of FIG. 1 with the wheels removed;

FIG. 7 is an end view of the embodiment of FIG. 1 with the wheels removed;

FIG. 8 is a top view of the embodiment of FIG. 1 with the wheels removed;

FIG. 9 is a back view of the embodiment of FIG. 1 with the wheels removed;

FIG. 10 is a bottom view of the embodiment of FIG. 1 with the wheels removed;

FIG. 11 is an isometric view of the embodiment of FIG. 1 with the frame & mount only;

FIG. 12 is a side view the embodiment of FIG. 1 with the frame & mount only;

FIG. 13 is an isometric view of the embodiment of FIG. 1 with the frame only;

FIG. 14 is a top view of the embodiment of FIG. 1 with the frame only;

FIGS. 15a-b depict a section view of the embodiment of FIG. 1;

FIGS. 16a-b depict another section view of the embodiment of FIG. 1;

FIG. 17 is an isometric view of an embodiment of the present disclosure;

FIGS. 18a-b depict a section view of the embodiment of FIG. 17;

FIG. 19 is a side view of an embodiment of the present disclosure;

FIGS. 20a-b depict a section view of the embodiment of FIG. 19;

FIG. 21 is a front view of the embodiment of FIG. 19;

FIGS. 22a-b depict a section view of another embodiment of the present disclosure;

FIG. 23 is an isometric view of another embodiment of the present disclosure;

FIG. 24 is an isometric view of another embodiment of the present disclosure;

FIG. 25 is a top view of the embodiment of FIG. 24;

FIG. 26 is a side view of the embodiment of FIG. 24;

FIG. 27 is a back view of the embodiment of FIG. 24;

FIGS. 28a-b depict a section view of the embodiment of FIG. 24;

FIG. 29 is an isometric view of another embodiment of the present disclosure;

FIG. 30 is another isometric view of the embodiment of FIG. 29;

FIG. 31 is a top view of the embodiment of FIG. 29;

FIG. 32 is a bottom view of the embodiment of FIG. 29;

FIG. 33 is a front view of the embodiment of FIG. 29;

FIG. 34 is a side view of the embodiment of FIG. 29;

FIG. 35 is another side view of the embodiment of FIG. 29;

FIG. 36 is another isometric view of the embodiment of FIG. 29;

FIG. 37 is another isometric view of the embodiment of FIG. 29;

FIG. 38 is a side view of another embodiment of the present disclosure;

FIG. 39 is a top view of the embodiment of FIG. 38;

FIG. 40 is an isometric view of the embodiment of FIG. 38;

FIG. 41 is a front view of the embodiment of FIG. 38;

FIG. 42 is a side view of another embodiment of the present disclosure;

FIG. 43 is a front view of the embodiment of FIG. 42;

FIG. 44 is an isometric view of the embodiment of FIG. 42;

FIG. 45 is a side view of another embodiment of the present disclosure;

FIG. 46 is an isometric view of the embodiment of FIG. 45;

FIG. 47 is a front view of the embodiment of FIG. 45;

FIG. 48 is a front view of another embodiment of the present disclosure;

FIG. 49 is a side view of the embodiment of FIG. 48;

FIG. 50 is a side view of another embodiment of the present disclosure;

FIG. 51 is an isometric view of the embodiment of FIG. 50;

FIG. 52 is a side view of another embodiment of the present disclosure;

FIG. 53 is an isometric view of the embodiment of FIG. 52;

FIG. 54 is a side view of another embodiment of the present disclosure;

FIG. 55 is an isometric view of the embodiment of FIG. 54;

FIG. 56 is an isometric view of another embodiment of the present disclosure with the tires removed;

FIG. 57 is a top view of the embodiment of FIG. 56 with the tires removed;

FIG. 58 is an isometric view of the embodiment of FIG. 56 with the tires shown;

FIG. 59 is a top view of the embodiment of FIG. 56 with the tires shown;

FIG. 60 is a side view of another embodiment of the present disclosure;

FIG. 61 is an isometric view of the embodiment of FIG. 60;

FIG. 62 is a side view of the embodiment of FIG. 60 with some components removed;

FIG. 63 is a top view of the embodiment of FIG. 60;

FIG. 64 is a side view of the embodiment of FIG. 60 with a cover installed;

FIG. 65 is an isometric view of the embodiment of FIG. 65 with a cover installed;

FIG. 66 is an isometric view of another embodiment of the present disclosure;

FIG. 67 is a side view of the embodiment of FIG. 66;

FIG. 68 is a top view of the embodiment of FIG. 66;

FIG. 69 is a front view of the embodiment of FIG. 66;

FIG. 70 is an isometric view of the embodiment of FIG. 66 with the center wheel raised;

FIG. 71 is a side view of the embodiment of FIG. 66 with the center wheel raised;

FIG. 72 is an isometric view of another embodiment of the present disclosure;

FIG. 73 is a side view of the embodiment of FIG. 72;

FIG. 74 is another isometric view of the embodiment of FIG. 72;

FIG. 75 is a side view of another embodiment of the present disclosure;

FIG. 76 is an isometric view of the embodiment of FIG. 75 shown in a twisted configuration;

FIG. 77 is a top view of the embodiment of FIG. 75 shown in a twisted configuration;

FIG. 78 is an isometric view of another embodiment of the present disclosure;

FIG. 79 is an isometric view of another embodiment of the present disclosure;

FIG. 80 is an isometric view of another embodiment of the present disclosure;

FIG. 81 is an isometric view of another embodiment of the present disclosure;

FIG. 82 is an isometric view of another embodiment of the present disclosure;

FIG. 83 is an isometric view of another embodiment of the present disclosure;

FIG. 84 is an isometric view of another embodiment of the present disclosure;

FIG. 85 is an isometric view of another embodiment of the present disclosure; and

FIG. 86 is a side view of the embodiment of FIG. 85.

DETAILED DESCRIPTION

The ensuing description provides embodiments only, and is not intended to limit the scope, applicability, or configuration of the claims. Rather, the ensuing description will provide those skilled in the art with an enabling description for implementing the described embodiments. Various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the appended claims.

Various examples are provided throughout the following disclosure. The disclosure of examples is in all cases intended to be non-limiting, including specifically when examples are identified with the terms or phrases identifying what follows to be an example, including the terms of phrases “for example,” “as one example,” “such as,” “by way of example,” and “e.g.” In other words, the disclosure of one or more examples is not intended to limit the present disclosure to embodiments conforming to the disclosed example(s).

Embodiments of vehicles disclosed herein typically (but not necessarily) comprise one or more of four primary features: multiple wheels with centrally located axles, the majority of the vehicle's weight located below the level of the axles with substantial portions inside the wheels, a simple frame to join the axles (and configured, in some embodiments, to support one or more vehicle components such as a vehicle battery), and joints that allow the axles to pivot independently from each other.

FIG. 1 shows an isometric view of the outside of a four-wheel embodiment of the present disclosure. The wheels 2 in FIG. 1 are considerably larger than the frame 3 of the vehicle. Wheels 2 are shown to be identical in size, but in some embodiments wheels 2 do not all have the same size. Most prior art vehicles require a large frame to house the motor, batteries, suspension, steering and everything else needed to operate the vehicle. This embodiment houses these vital components inside the wheels 2. In this three-wheel variation, the frame 3 has a pivot 1 that allows portions of the frame to move up and down independently. In this case, the pivot 1 allows the two outer wheels 2 to move up and down without influencing the center wheel 2 or each other.

FIG. 2 is another isometric view depicting the other side of the vehicle of FIG. 1. As with most embodiments of the present disclosure, this vehicle does not have a front or a back, allowing the vehicle to run at full speed in both directions by simply reversing the electronic controls on the transmitter. The wheels 2 are connected at their axles by a simple frame 3 with two pivots or hinges 1.

FIG. 3 is a side view of the outside of the same three-wheel embodiment of FIG. 1, and makes one of the main advantages of the depicted embodiment readily apparent. Specifically, this embodiment is incredibly difficult to high-center (i.e. where the ground contacts the frame undesirably). Because vehicle components that, in prior art vehicles, are typically attached to the vehicle frame outside of the wheels have been relocated inside the wheels 2, embodiments of the present disclosure utilize only a minimal frame 3 interconnect the wheels 2. With such a minimal frame 3, high-centering is very unlikely. Indeed, in the embodiment of FIG. 3, the side and center wheels 2 are close enough in distance that it is almost impossible for any type of terrain to contact the frame 3.

In embodiments, the frame 3 can be any object or collection of objects capable of supporting two or more wheels 2. For example, the frame 3 can comprise a stick, a shipping container, a PODS® container (PODS® is a registered trademark of PODS Enterprises, Inc.), or any other object or collection of objects without departing from the scope of the present disclosure. The wheels 2 may be directly attached to the frame 3, or may be attached to the frame 3 through modified frame mounts 7. As another alternative, the wheels 2 may be attached to an adapter, which is in turn attached to the frame 3.

As shown in the front view in FIG. 4, this three-wheel embodiment has incredible traction due to the majority of the vehicle's width being covered in tire tread. This embodiment therefore has considerably more surface traction than other prior art vehicles of its same size.

The top view of the three-wheel embodiment displayed in FIG. 5 allows for a clear view of the frame 2 and pivots 1, and also depicts how the small frame 3 allows each wheel 2 to move up and down independently.

FIGS. 6-10 show the wheels and tires 2 removed from view to allow a look into the inside of this embodiment. As discussed previously, this three-wheel embodiment is designed as a remotely operated vehicle (ROV), but this configuration is only an option and is not meant to limit the scope of the invention. FIGS. 6-10 show the main components needed to operate this ROV embodiment, with the exception of the transmitter and the wheels or tires 2. The battery 6 is connected to the motor control or ESC 9. The motor control 9 is connected to both the receiver 5 and the motor 11. The receiver 5 accepts the signal from the transmitter (not shown) and sends that information to the engine/motor control 9 which tells the motor 11 how to operate. These electronics are only an option and are not meant to limit the scope of the invention. Although the present embodiment is described as having a motor 11, a battery 6, and a motor control 9, other embodiments may utilize an engine, a fuel tank, and a throttle.

Also shown in FIGS. 6-10, the frame 3 links the three axles 12 into one unit which is able to pivot on either side by use of the frame pivots 1. Frame mounts 7 hold the electronics to each axle 12. The frame mounts 7 hang the majority of the components below the center point of each axle 12, allowing the vehicle to have an extremely low center of gravity. FIGS. 6-10 also show a small antennae tube 4 that allows the antennae to be positioned towards the top of the vehicle for better reception. Two bearings 8 on each axle 12 allow the wheels 2 to rotate around the axles 12. The motor 11 has a small pinion gear 13 (best viewed in FIG. 8) that drives the spur gear 10. The spur gears 10 are directly attached to the wheels 2. Since the wheels 2 are free to rotate on the axles 12 due to the use of bearings 8, the motor 11 rotates the pinion 13, which drives the spur gear 10, allowing the motor 11 to rotate the wheels 2 and drive the vehicle. The use of a transmission or gearbox is also possible (not shown), but is not necessary to operate the vehicle. For directional turning of this embodiment, the two side motors 11 vary their speed, allowing the vehicle to spin and turn without the need for forward movement like most prior art vehicles. This style of turning a vehicle is similar to the turning of a tank or a skid-steer. Steering in this way is only an option and is not meant to limit the scope of the invention.

FIGS. 11-12 show the drive components removed from the three-wheel embodiment of FIG. 1. The frame 3 is shown, together with the axles 12. Also shown are the frame mounts 7. The reason the frame mounts are shown and discussed as separate from the frame 3 is that the frame mounts 7 can be additionally driven (not shown) around the axles to adjust the center of gravity of the vehicle. If the frame mounts 7 were to have an additional motor or servo allowing them to rotate on the axle, then it is possible to simply flip the insides of the vehicle with a button, switch, or other selection device on the transmitter. This configuration (not shown) would allow the center of gravity to reverse itself if the vehicle were to be flipped upside-down, creating a vehicle that not only has no front or back, but also no top or bottom. Flipping the vehicle upside down would not affect the function of the vehicle in any meaningful way. The user would simply press a button, flip a switch, or otherwise cause the transmitter to send an appropriate command to the receiver 5, which would then cause the insides of the vehicle to internally relocate (for example, by rotating around the axle) to restore the low center of gravity. It is also possible to flip the internal components by using gravity alone and a simple locking feature, activated by a sensor that detects that the vehicle has flipped over or by a remote switch, to keep the internal components in the proper location. Alternatively, a solenoid or linear actuator can be used to operate the internal flipping feature (not shown). A combination of these methods can also be employed to lower the center of gravity if the vehicle is flipped upside down. It is important to note that without this internal flipping feature (not shown), the vehicle will still function properly after being flipped upside down, except that the center of gravity will be higher than normal for the vehicle.

FIGS. 13-14 show the three-wheel embodiment of FIG. 1 with the frame mounts 7 removed from view. FIGS. 13-14 represent the entire frame of this embodiment, including the axles 12 and the frame pivots 1. These views allow for a better understanding of the difference between the frames of embodiments of the present disclosure and the frames of prior art vehicles. It is also important to note that frame pivots 1 are only an option and are not meant to limit the scope of the invention.

The sectional views in FIGS. 15-16 better show the weight distribution (center of gravity) of embodiments of the present disclosure. As discussed previously, the bulk of the vehicle's weight and components are located below the height of the axle 12 and inside the wheels 2. This allows for the center of gravity to be extremely low as compared to prior art vehicles. FIG. 16 shows this best. The two heaviest single components in typical embodiments of the present disclosure are the motor 11 and the battery 6, which are extremely low to the ground. When such embodiments encounter an object or an obstruction, the large wheels 2 will allow the motor 11 and battery 6 to maintain their low position, but still drive over the object. Also, it should be appreciated that either the right side or the left side of FIG. 15b may correspond to the bottom of the vehicle. In some embodiments, the right side of the vehicle corresponds to the bottom of the vehicle so that the motor(s) 11 and battery 6 are positioned beneath the axles 12 of the wheels 2, thereby maintaining a low center of gravity for the vehicle.

FIGS. 17-18 show a three-wheel embodiment similar to the embodiment of FIG. 1 but that uses waterproof wheels 2 that prevent water or liquid from entering the inside of the wheels 2. With the correct weight to air-cavity distribution (buoyancy), this embodiment is able to both float and propel itself on water. The amphibious embodiment is identical to the previously described embodiment of FIGS. 1-16 with the exception of adding a waterproof seal to the interior of the wheels and, optionally, changing the tires 14 to a more scooped design, allowing for better propulsion on the water. The steering of the amphibious embodiment is accomplished in the same manner as the previously described embodiment, i.e. slowing one side of the vehicle and speeding up the other.

All embodiments of the present disclosure can be used on either land or water (given an acceptable weight to air-cavity distribution (buoyancy)) by simply sealing the wheels. This sealing may be accomplished with a semi-permeable membrane 15 that is permeable to air but impermeable to water. Use of such material allows the motors 11 and other internal mechanisms to be air cooled while preventing liquid from entering the wheels 2. This semi-permeable membrane 15 is only an option and not meant to limit the scope of the invention. Alternative ways to cool the internal mechanisms in each wheel 2 include using liquid cooling or air conditioning, creating a cooling effect for the motors 11, batteries 6, and other internal components while still allowing the wheels 2 to be sealed for amphibious driving.

FIG. 18 additionally displays the use of an external shock absorber 19. Unlike prior art vehicles, embodiments of the present disclosure do not require the use of shock absorbers to allow the wheels to move independently of each other or to move at all. Prior art vehicles use shocks and springs to allow the wheels to move up and down over bumps and dips notwithstanding the weight of the vehicle. Embodiments of the present disclosure have the majority of their weight in the wheels 2 themselves, allowing for a completely different way of looking at the use of shock absorbers and springs 19. In this variation, the shock absorber 19, placed on its side, does not have any vehicle weight riding on it when the wheel is not riding over a bump or a dip. Unlike prior art vehicles, embodiments of the present disclosure employ a two-way shock absorber 19, i.e. a shock absorber having two opposing springs. One spring applies force when the wheel 2 moves upward in relation to the other wheels 2. The other spring applies force when the wheel 2 moves downward in relation to the other wheels 2. The absorber portion of the shock can remain the same, applying resistance and slowing movement in either direction. A horizontally placed shock and spring setup 19 with two-way springs is only an option and is not meant to limit the scope of the invention.

Shocks and springs may be used in many configurations on embodiments of the present disclosure, including in configurations that may not be possible on prior art vehicles. Shock absorbers 19 can be applied to all embodiments of the present disclosure, but are not required. The use of internal shock absorbers within the wheels 2 can also be used (not shown) to improve the safety of the components or people within the wheels 2.

FIGS. 19-27 show other embodiments of the present disclosure, including embodiments with different wheel configurations. FIGS. 19 through 21 present a two-wheel embodiment that, like all embodiments of the present disclosure, has a lower center of gravity than typical prior art vehicles. This lower center of gravity allows the two-wheel embodiment to remain upright while not moving, i.e. it will not fall over as would, for example, a motorcycle. The sectional view in FIG. 20 shows the majority of components located below the axles 6 and inside the wheels 2. FIG. 20 also shows the use of an optional weight 17 that further lowers the center of gravity. This optional weight 17 can also be utilized with other embodiments of the present disclosure, but is only an option and is not meant to limit the scope of the invention.

As mentioned earlier in the document, steering by adjusting the speed of one or more motors 11 is only an option. As one non-limiting example, steering in various embodiments of the present disclosure can also be accomplished by use of a typical steering rack (i.e. a rack and pinion) as used on the majority of prior art vehicles. Components of a rack and pinion system, if used, would likely need to be installed outside of the wheels 2. Linear actuators 16 provide another one of the many options for steering embodiments of the present disclosure. By extending one linear actuator 16 but not the other, the wheels 2 can be turned relative to each other, thus providing directional control to the vehicle.

Linear actuators 16 can also be used to adjust the overall wheel base length, thus creating additional benefits. Due to the simplicity of the frames 3 of embodiments of the present disclosure, the length of the frames 3 can easily be adjusted, even during operation, with the use of linear actuators 16. Adjusting wheel base can have many advantages, including but not limited to improving the vehicle's ability to climb stairs by lengthening the frame length, improving the vehicle's high speed performance by reducing the frame length, and allowing a vehicle stuck in mud or ruts to simply push out of the mud or ruts by lengthening the wheel base.

FIGS. 22a-b present an embodiment of the present disclosure that is built to move people. Although depicted only in connection with this three-wheel embodiment, any embodiment of the present disclosure can be adapted to carry one or more persons. The chair 18 shown in FIG. 22b allows a person to drive the vehicle from within the wheel 2 itself, which further lowers the vehicle's center of gravity. As persons of ordinary skill in the art will recognize, equipment specific to the remote operation of a vehicle is not required in embodiments of the present disclosure adapted to be control by a person within the vehicle. Some embodiments, however, include equipment for both remote operation and direct control, thus allowing the vehicle to be used in different ways to meet the requirements of a particular purpose or mission.

FIG. 23 presents another embodiment that, similar to the two-wheel variation shown in FIGS. 19-21, has linearly aligned wheels 2. In other words, the wheels 2 are in line with each other, as are the wheels of a motorcycle. This embodiment differs from the embodiment depicted in FIGS. 19-21 in that it employs four wheels 2. Hinged joints 1 on the frame 3 between each wheel 2 allow each wheel 2 to move up and down with varying terrain. This embodiment, as with other embodiments, is not limited to the number of wheels shown.

FIGS. 24-28 display another important embodiment of the present disclosure, which has four wheels 2 in an arrangement similar to that of a typical car. Directional control of this embodiment is provided by independently adjusting the speed of the left-side and right-side wheels 2, similar to the way a tank directionally steers. This steering option is, once again, only an option and is not meant to limit the scope of the invention. The embodiment shown in FIGS. 24-28 has four (optional) separate hinge points 1, allowing all four wheels 2 to move up and down independently from each other. As best seen in FIG. 28b , in this embodiment, as in other embodiments described herein, as much of the vehicle's weight as possible is located inside the wheels 2 and below the axles 12. The four-wheel embodiment provides advantages and disadvantages over the three-wheel embodiment of FIG. 1. One disadvantage is the lack of a center wheel 2 for use as a pivot for steering. The four-wheel embodiment can still turn quickly, but not as easily and with more friction than the three-wheel embodiment of FIG. 1. One advantage is that the additional wheel provides a balanced front and back, resulting in a vehicle without a front end or back end. This, in turn, allows the four-wheel embodiment to have the same driving characteristics in both forward and reverse. Another advantage of the four-wheel embodiment relative to the three-wheel embodiment is that the fourth wheel 2 provides additional traction, i.e. for climbing steep terrain. Additionally, in some embodiments, the wheels can be offset from one another. In particular, the left wheels (e.g., left two, three, four, or more wheels) can be slightly offset relative to the right wheels such that the center of rotation of one wheel does not coincide with a center of rotation of another wheel. Then, for example, when the vehicle encounters a challenging obstacle, only one wheel of the vehicle encounters the challenging obstacle at a time. As with other embodiments depicted herein, the side-by-side arrangement of the wheels 2 depicted in FIGS. 24-28 is not limited to four-wheel embodiments of the present disclosure. An embodiment having, for example, six or eight wheels 2 can also utilize a side-by-side wheel arrangement while providing greater traction and/or buoyancy for various applications.

FIGS. 29-37 depict yet another embodiment of the present disclosure, having two wheels 2. The frame 3 of this embodiment comprises two components, each connected to a wheel 2 and pivotally connected to each other. A motor or servo 20 is attached to the frame 3 and configured to rotate the components of frame 3 relative to each other, thus providing directional control to the vehicle. In some embodiments, the motor or servo 20 may be equipped with its own receiver and control system, while in other embodiments the motor or servo 20 may be in wired communication (i.e. through one or both components of frame 3) with a receiver and control system with one or both wheels 2. The frame 3 and/or motor or servo 20 may also be equipped with a damper system to prevent unwanted rotation of the components of frame 3 around the pivot point. Although this pivoting frame 3 is shown in connection with a two-wheeled vehicle, a pivoting frame may also be used in vehicles having more than two wheels.

Embodiments of the present disclosure may utilize wheel tilting or leaning suspension systems. The suspension system may be tuned to provide even wheel lean, or it may be controlled automatically or manually. Additionally, the suspension may be configured to provide proper wheel lean regardless of whether the vehicle is moving forward or backward.

It is important to note that the present disclosure describes a platform for a vehicle structure that lowers the center of gravity, allowing for improved climbing of obstacles and improved cornering capability. The platform is not limited to the size or type of motors (or engines) used, the electronics displayed in this document, the configuration of the electronics, or the vehicle propulsion methods. Nor does the platform limit the amount or type of additional sensors or electronics that may be used together with the vehicle structure described herein. As one non-limiting example, a people mover embodiment of the present disclosure may employ cameras with monitors to allow the driver to operate the vehicle from within one of the wheels 2. As another non-limiting example, remote cameras, or weapons systems not shown in this document, may be added to embodiments of the present disclosure. Even mechanical arms and sensors (i.e. for bomb disposal or other hazardous operations) may be included in embodiments of the present disclosure, as described in greater detail below.

Embodiments of the present disclosure have many applications, some of which are discussed above. As another non-limiting example, each soldier in a small group could carry a single wheel 2 and/or a portable frame 3 (or portable elements to construct a frame 3). The wheels 2 could be combined on or off the battlefield with the frame 3 in various configurations to create a variety of functional vehicles for use as the need arises. Because the majority of the drive components are contained within the wheels 2, such that each wheel is self-powered, it is possible to use a single set of a plurality of wheels 2 to create a variety of different embodiments of the present disclosure to perform various functions, all from the same set. By incorporating quick-attach features for the axles 12 of each wheel (even tool-less quick-attach features), the wheels 2 may be easily moved into different configurations on a variety of frames 3, as need to accomplish various applications. For example, three wheels 2 could be configured into a small UGV (unmanned ground vehicle) for scouting ahead, while using another three self-powered wheels 2 to carry extra weight like ammunition. Then, when the need arises, all six wheels 2 from both vehicles could be attached to two backpack frames to create a motorized stretcher for an injured soldier. This same motorized stretcher could become a high speed platform to move a sniper into position, while staying extremely low to the ground to avoid detection. As another example, an embodiment of the present disclosure could be used to move a heavy weapon into place, then the wheels 2 could be removed from the vehicle and reconfigured as needed for use on the battlefield as an ROV or to move additional heavy weapons into place without the need to create an entire vehicle structure for each weapon platform.

As yet another example, in some embodiments of the present disclosure the frame 3 and/or another component of the vehicle is equipped with magnets sufficiently strong to support the weight of the vehicle. In such embodiments, the vehicle can travel vertically or upside down over metal surfaces, with the magnets providing sufficient attractive force to the surface to overcome the force of gravity. Such embodiments could also, for example, be adapted for travel over water as previously described herein, and could then climb up the hull of a ship for emergency response, reconnaissance, surveillance, or other purposes. These are but a few of the many options for embodiments of the present disclosure and are not meant to limit the scope of the disclosure. Indeed, vehicle platforms described herein may be combined with numerous technologies to fulfill a wide variety of purposes or missions.

In various embodiments according to the present disclosure, one or more vehicle components such as the battery 6 can be mounted below the level of the wheel axles 12, but outside of the wheels 2 on the frame 3. Such an arrangement frees up space in the wheel interior for a larger motor 11, more storage, or other purposes. The battery 6 (or other frame-mounted component(s)) may be slung below the frame 3 on a mount. The mount may be fixed, or it may be rotatable around the frame 3 such that if and when the vehicle flips over, the force of gravity causes the frame-mounted component to either remain in position underneath, or to rotate back underneath, the frame 3. The same flipping mechanisms and methods described above with respect to components mounted on or around the axles 12 may also be used for components mounted on or around the frame 3.

In amphibious embodiments of the present disclosure, vehicle components that are waterproof or that can easily be waterproofed may be mounted on the frame 3, while space inside the wheels 2 may be utilized for vehicle components that are not waterproof and cannot easily be waterproofed.

In still other embodiments, each wheel 2 on a vehicle according to the present disclosure includes a motor 11 (mounted inside the wheel 2 and below the wheel axle 12, as described above). Depending on the purpose for which the vehicle will be used, placement of a motor 11 in each wheel 2 can be advantageous, for example, for reducing the size of each motor (e.g. to maximize interior wheel space), increasing the overall power of the vehicle (e.g. to maximize speed or carrying capacity), and/or improving the controllability of the vehicle (e.g. to enhance vehicle handling).

A series of additional embodiments of the present disclosure, some implementing one or more of the concepts discussed above, will now be described.

FIGS. 38-41 depict a vehicle 300 according to an embodiment of the present disclosure, the vehicle 300 comprising four wheels 2 mounted to a frame 3. Depending on the overall dimensions of the vehicle and the loads that it may be expected to carry, the frame 3 may be made of a stiff plastic, of a composite material such as fiberglass or carbon-fiber, of wood, or of metal. The frame 3 comprises suspension elements 26 as well as a mounting bar 25, to which a variety of tools, devices, or implements may be attached. Example tools, devices, or implements include, without limitation, a stretcher, a cargo carrier, a robotic arm, and a weapon or weapons system. The mounting bar 27 may comprise a plurality of attach points 58 to facilitate the rapid attachment and detachment of a given tool, device, or implement to or from the mounting bar 25. The vehicle 300 is thus highly versatile and quickly adaptable for different purposes by simply changing the tool, device, or implement that is attached to the mounting bar 25.

Also provided on the frame 3 of the vehicle 300 are one or more sensors 27, one or more lights 28, and one or more cameras 31. The cameras 31 may be used to provide images or a video feed of the terrain and any obstacles in front of the vehicle 300 to an operator thereof. The light 28 may be used for the purpose of providing light needed for the proper operation of the cameras 31 and/or sensors 27. For example, if the vehicle 300 is utilized at night or in a dark environment, the light 28 may provide lighting necessary to allow the cameras 31 to obtain a properly exposed image or video feed.

Images or video feeds obtained by the cameras 31, and data obtained by the sensors 27, may be transmitted to a control station, where an operator of the vehicle 300 may use the transmitted images, video feeds, and/or data to guide the vehicle 300. When the control station and the operator are located within one of the wheels 2, the data from the cameras 31 and the sensors 27 may be transmitted via a wired connection (e.g. through the frame 3) or a wireless connection to the control station. When the control station and the operator are located remotely, the images and/or video feeds from the cameras 31 and data from the sensors 27 may be transmitted via a wireless connection.

Each camera 31 may be a still camera or a video camera. The cameras 31 may further be configured to capture and record images or video feeds in the visible light spectrum or in the infrared spectrum. The cameras 31, which are preferably although not necessarily digital cameras, may be coupled to a processor configured to enhance or otherwise process captured images or video feeds. The cameras 31 may also be in communication with a computer readable memory, in which images or video feeds captured by the cameras 31 may be stored. In some embodiments, the cameras 31 may be mounted in a fixed position, while in other embodiments, the cameras 31 may be attached or affixed to a movable mount or platform that can adjust the direction and angle in which the cameras 31 point based on signals received from an operator. For example, a movable mount may utilize motors or servos that respond to received signals by turning one or more gears to move the camera mount relative to one or more axes or planes.

The sensors 27 may comprise one or more of, for example, a microphone, a temperature sensor, an infrared sensor, an ultraviolet sensor, a proximity sensor, and an optical spectrometer. The sensors 27 may utilize one or more of a laser, a radar, and a sonar. The sensors 27 may be controllable by an operator of the vehicle 300, or they may operate automatically. In some embodiments, the operation of one or more of the sensors 27 may be automatic, but operation of the sensors 27 may also be dependent on whether the vehicle 300 is powered on or off, whether the vehicle 300 is stopped or in motion, and/or the speed of the vehicle 300. Although the cameras 31, the sensors 27, and the light 28 are depicted on the vehicle 300 depicted in FIGS. 38-41, other embodiments of a vehicle like the vehicle 300 with a mounting bar 25 may not have one or more of the cameras 31, the sensors 27, and/or the light 28.

With reference now to FIGS. 42-44, a vehicle 310 according to some embodiments of the present disclosure may comprise a basket stretcher 30 mounted to a mounting bar 25 of a vehicle similar or identical to the vehicle 300. The basket stretcher may be configured with attachment points that match the attachment points 58 of the mounting bar 25, so as to facilitate the rapid attachment and detachment of the basket stretcher 30 to the mounting bar 25. To ensure the basket stretcher 30 has adequate clearance above the wheels 2 of the vehicle 310, the mounting bar 25 may be adjustable from a lowered position as depicted in FIGS. 38-41 to a raised position by adjusting the suspension elements 26 as depicted in FIGS. 42-44.

Camera 31 a may be mounted to one side of the basket stretcher 30 near one end thereof, and used to capture images or a video feed useful for operating the vehicle 310 remotely (e.g. by providing an operator with an image or video feed of what is in the path of the vehicle 310). The camera 31 a may be in communication with an antenna 32 a, which may be used to receive commands from an operator (e.g. via a control station) regarding operation of the camera and/or of a mount to which the camera is connected, and may also be used to transmit data from the camera to an operator (e.g. to the operator's control station).

Camera 31 b may be mounted sufficiently above the basket stretcher 30 to allow visual monitoring of a patient being transported by the basket stretcher 31 b. For example, an operator of the vehicle 310 may monitor the patient from a control station, or a physician or other health care provider—who may be stationed at the control station or remotely from the control station—may monitor the patient. The camera 31 b may be in communication with an antenna 32 b, which may have the same or similar functionality as the antenna 31 a. However, the antenna 32 b may, but need not, transmit data from the camera 32 b to the same or to a different place as the antenna 32 a.

FIGS. 45-47 depict another vehicle 320 according to embodiments of the present disclosure. The vehicle 320 may be the same as or similar to the vehicles 300 and 310, but with a cargo rack 34 mounted to the mounting bar 25. As with the stretcher 30, the cargo rack 34 may comprise a plurality of attachment points that match the attachment points 58 on the mounting bar 25, to facilitate the rapid attachment and detachment of the cargo rack 34 to the mounting bar 25. The cargo rack 34 may comprise one or more straps 35 for securing cargo to the rack 34. A camera 31 b may be mounted sufficiently above the cargo rack 34 to allow visual monitoring of the cargo on the cargo rack 34, and a plurality of cameras 31 c, 31 d, and 31 e may be mounted around the perimeter of the cargo rack 34 so as to allow visual monitoring of the area surrounding the vehicle 320. Such visual monitoring may be useful, for example, for security purposes (e.g. to prevent theft of cargo on the cargo rack 34) and for safety purposes (e.g. to ensure that the vehicle 320 is not operated in, or is carefully operated when in, close proximity to people, other vehicles, or the like). The cameras 31 c, 31 d, 31 e may also be useful for allowing an operator of the vehicle 320 to see along the path of movement of the vehicle 320, regardless of whether the vehicle moves forward or backward.

Also included on the vehicle 320 is a sensor turret 33. The sensor turret 33 comprises a plurality of sensors and/or cameras, and is rotatably mounted so as to allow the sensor turret 33 to point in any one of a plurality of directions, whether automatically or as directed by the operator of the vehicle 320. For example, the sensor turret 33 may be configured to automatically and continuously scan a predetermined area, or to automatically and continuously scan in a predetermined pattern (which may be, for example, an area or pattern selected by the operator, or an area or patterned programmed into the vehicle 320 or the sensor turret 33 upon manufacture thereof). The sensor turret may be useful for facilitating safe operation of the vehicle (e.g. by sensing obstacles and/or detecting potential collisions and adjusting the speed or direction of the vehicle 320 so as to avoid the obstacles and/or potential collisions), or for monitoring of the environment of the vehicle 320 (including the geographic environment, the human environment, the electromagnetic environment, the aerial environment, or any other environment in or near which the vehicle 320 operates). In some embodiments, one or more instruments, tools, or even weapons may be included in the sensor turret, including, for example, a GPS receiver, a microphone and/or speaker, or a laser for cutting through material or for destroying enemy objects.

Referring now to FIGS. 48-49, a vehicle 330 according to some embodiments of the present disclosure may comprise a frame 3 with a mounting bar 25 and four wheels 2, but may omit the suspension elements 26 of the vehicle 300. As with the vehicle 300, the vehicle 330 may comprise one or more cameras 31, one or more sensors 27, and one or more lights 28 mounted to the frame 3 or the mounting bar 25.

FIGS. 50-51 depict a vehicle 340 comprising a single wheel 2 comprising a hub motor 32 that is attached directly to the wheel 2 along the axle 12 of the wheel 2. The hub motor 32 is lighter than the five batteries 6 positioned generally below the hub motor 32, thus ensuring that the center of gravity of the wheel 2 remains below the axis of rotation of the wheel 2. The vehicle 340 also comprises a receiver 5 and a motor control 9. The embodiment of FIGS. 50-51 may be used as a stand-alone vehicle 340, as depicted, or a plurality of such embodiments may be utilized on a multi-wheeled vehicle such as the vehicle 300, or a vehicle comprising a plurality of wheels 2 that are not aligned at the axle.

FIGS. 52-53 depict another self-contained vehicle 350 comprising a single wheel 2. The vehicle 350 comprises a motor 11 with an off-axis mount point, allowing more batteries 6 to fit within the wheel 2. Preferably, but not mandatorily, the motor 11 is mounted above the axle 12 of the wheel 2 of the vehicle 350, thus allowing batteries 6—which, in embodiments, are heavier (i.e. have more mass) than the motor 11—to be positioned as low as possible within the wheel 2, and therefore contributing to the low center of gravity of the vehicle 350. The motor 11 may be operably connected to a spur gear 10, a belt, or a chain for transmitting force to and driving the wheel 2. The motor 11 may be controlled by a motor control or electronic speed control 9, and may receive control signals via a receiver 5. The embodiment of FIGS. 52-53 may be used as a stand-alone vehicle 350, as depicted, or a plurality of such embodiments may be utilized on a multi-wheeled vehicle, including on a multi-wheeled vehicle in which a plurality of wheels are not aligned at the axle.

Vehicle 360 depicted in FIGS. 54-55 comprises internal suspension provided by suspension element 26. Although not visible in FIGS. 54-55, the vehicle 360 may comprise a motor such as the motor 11 within the wheel 2, which may be mounted off-axis. The drive train arm 38 may be configured to transmit force either from such a motor within the wheel 2 to an accessory used in conjunction with the wheel 2 (as in the embodiment of FIGS. 85-86, discussed below), or from an external motor into the wheel 2 for the purpose of driving the wheel 2 (e.g. when the wheel 2 is not equipped with its own motor 11). The embodiment of FIGS. 54-55 may be used as a stand-alone vehicle 360, as depicted, or a plurality of such embodiments may be utilized on a multi-wheeled vehicle, including on a multi-wheeled vehicle in which a plurality of wheels are not aligned at the axle.

A wheel such as the wheel 2 according to embodiments of the present disclosure may comprise a cover such as the cover 39 on either side of the wheel 2 or on both sides of the wheel 2. For example, FIGS. 58-59 portray wheels that are open on the inside (e.g. the side of the wheel nearest the frame 3) but covered on the outside (in this embodiment, with a force-transmitting wheel plate 37). The wheels of the embodiment of FIGS. 58-59 are therefore beneficially able to slide over the cylindrical housing 21 of FIGS. 56-57. As another example, FIGS. 72-74 portray wheels 2 that are covered on the inside, but open on the outside, which beneficially allows persons to enter into and exit out of the interior of the wheels 2. As still another example, FIGS. 66-71 portray wheels 2 that are closed on both sides, which beneficially prevents debris and other foreign objects from entering into the interior of the wheels 2.

Referring now to FIGS. 56-59, a vehicle 370 according to some embodiments of the present disclosure may comprise an internal body 375 comprising two cylindrical housings 21 connected at or near a central portion thereof to a frame 3. The connection may be made via two pivots or joints 1 to allow the cylindrical housings 21 to pivot in at least one plane around the frame 3. One or both of the cylindrical housings 21 may contain drive- and control-related components of the vehicle 370, including a motor such as the motor 11, a motor control or electronic speed control such as the motor control/ESC 9, one or more batteries or other energy sources such as the batteries 6, a receiver such as the receiver 5 for receiving wireless signals for controlling the motor via the motor control, and so forth.

The cylindrical housings 21 comprise a drive socket 29 on each end of the cylindrical housings 21 to each of which a force-transmitting wheel plate 37 of a wheel 2 may be connected for transmitting rotational force from a motor within the internal body 375 to the wheel 2. In some embodiments, the drive sockets 29 may be provided only on one cylindrical housing 21, or one or both of the cylindrical housings 21 may have only one drive socket 29 each. Tires 14 may be mounted on the cylindrical housings 21 via a bearing that surrounds the circumference of the cylindrical housings 21 on each side of the frame 3, to allow rotation of the wheel 19 without simultaneous rotation of the cylindrical housings 21. The force-transmitting wheel plate 37 may comprise one or more features (e.g. a key or a keyed shaft extending inwardly from the wheel plate 37) that can be inserted into and/or interlock with one or more features of the drive socket 29 (e.g. a keyway or a cylindrical bore with a keyway) for reducing or eliminating slippage between the drive socket 29 and the force-transmitting plate 37.

The cylindrical housings 21 also comprise an access panel 24 through which internal components of the cylindrical housings 21 (e.g. the motor 11, the batteries 6, the motor control 9, the receiver 5) may be installed, maintained, and/or removed. Each cylindrical housing 21 may also comprise a quick-access cap 23 through which at least some interior components of the cylindrical housings 21 may be accessed. For example, electrical connections for recharging any batteries within the cylindrical housing 21 may be accessible through the quick-access cap 23. Additionally, one or more external antennas may be connected to a receiver such as the receiver 5 with a wire that passes through the aperture covered by the quick-access cap 23. A hitch 22 on each cylindrical housing may be used for connecting a trailer or other accessory to the cylindrical housing for hauling by the vehicle 370. In some embodiments, the location of the hitch 22 may be used instead for the installation of one or more sensors such as the sensors 27, lights such as the lights 28, or cameras such as the cameras 31.

In some embodiments, the cylindrical housings 21 may be waterproof, with gaskets or other seals lining the openings covered by the access panel 24 and the quick-access cap 23 and any other covered opening to prevent water from leaking therethrough. The use of sealed cylindrical housings 21 in this manner beneficially increases the buoyancy of the vehicle 370, enhancing the ability of the vehicle 370 to travel over water, particularly when equipped with scooped tires 14 as described elsewhere herein.

With reference now to FIGS. 60-65, a self-contained vehicle 380 comprises a motor 11 offset from the axle 12 and configured to drive the axle 12 via a spur gear 10. The motor 11 is powered by at least one battery 6, which also powers a motor control 9. A frame mount 7 supports the motor control 9, the battery 6, and the motor 11 on the axle 12 of the wheel 2 of the vehicle 380. A cover 39 protects the internal components of the wheel 2 from large debris, yet allows air to flow through the wheel 2 to aid in the cooling of the internal components of the wheel 2.

FIG. 62 depicts the vehicle 380 with certain components removed, allowing for a better view of the remaining components. For example, in FIG. 62 a receiver 5 and associated antenna 32 are more readily visible. As can be seen in FIGS. 63 and 65, the axle 12 of the vehicle 380 extends beyond the plane formed by the inside edge of the wheel 2 (e.g. beyond the cover 39), and thus allows use of the vehicle 380 as a modular locomotive element that can be attached to a variety of platforms or tools to enable movement of the same.

With reference now to FIGS. 66-71, a vehicle 400 according to other embodiments of the present disclosure comprises five wheels 2, arranged so that a single central wheel 2 provides a central point of connection for two frames 3 that each support two wheels 2. The frames 3 each comprise a plurality of suspension elements 26, which may be utilized to raise or lower the central wheel 2 relative to the outside wheels 2. Each wheel 2 comprises a cover 39 on each side thereof to protect the internal components of the wheel 2. In the vehicle 400, any one or more of the wheels 2 may comprise internal drive and control components, including but not limited to a motor 11, a receiver 5, a battery 6, and a motor control 9. Inclusion of a fifth wheel in the vehicle 400 advantageously helps to prevent the vehicle 400 from becoming high-centered when traversing uneven terrain.

FIGS. 72-74 depict a vehicle 420 according to still another embodiment of the present disclosure. The vehicle 420 comprises four wheels 2, each mounted to a frame 3. The frame 3 may be provided with a pivot or joint 1 and with one or more suspension elements to dampen rotation at the pivot or joint 1. Each wheel 2 of the vehicle 420 comprises a seat or chair 18 mounted to an operator support 42. The operator support 42 is mounted to the wheel 2 via a bearing 55 that allows the operator support 42 and the chair 18 to remain substantially stationary as the wheel 2 rotates. A control joystick 40 mounted on or near the chair 18 allows an occupant of the chair 18 to control the vehicle 420. Given that an occupant's forward view is blocked by the wheel 2, one or more screens 41 are provided in front of the occupant, which may be used to display images captured by, or, more preferably, a video feed from, one or both of the cameras 31 mounted on the fore and aft ends of the frame 3. The screens 41 may also display data received from the sensors 27, which are mounted near the cameras. Lights 28, also mounted near the cameras 31, may be used to provide illumination when the vehicle 420 is traveling at night.

Turning now to FIGS. 75-77, a vehicle 430 according to some embodiments of the present disclosure comprise four wheels 2 with a frame 3 that is provided with a rotary joint 56. The rotary joint 56 allows rotation of the front set of wheels 2 around a rotational axis defined by the frame 3. As a result, when the vehicle 430 travels over terrain with an increasing or decreasing slope, each set of wheels 2 can rotate as necessary so that the axles thereof are parallel to the ground over which that set of wheels 2 is traveling, thus enhancing the ability of each wheel 2 to maintain traction.

FIG. 78 depicts a robot 440 according to one embodiment of the present disclosure that comprises a robotic arm 45 mounted to a frame 3 via a rotary mount 43. Four wheels 2 are mounted to the frame 3, thus giving the robot 440 locomotive ability. One or more suspension elements 26 are provided to reduce the amount of force transmitted through the rotary mount 43. The robot 440 comprises a sensor turret 33, a camera 31, a light 28, and a plurality of antennas 32 for transmitting data captured by the sensor turret 33 and the camera 31, and for receiving control information for the sensor turret 33, the camera 31, and the robotic arm 45. The robotic arm 45 comprises a robotic hand 44, which allows the robot 440 to be used, for example, for bomb disposal or other dangerous or unpleasant tasks.

FIG. 79 depicts another robot 450, which also comprises a frame 3 supporting a rotary mount 43 and four wheels 2. As with the robot 440, the robot 450 includes one or more suspension elements 26 for reducing the amount of force transmitted through the rotary mount 43. The robot 450 comprises a plurality of cameras 31 mounted so as to give an operator of the robot 450 a view of the robot 450's surroundings as well as a view of the area in front of the robotic arm 45, and more particularly in front of the robotic hand 44, to facilitate operation thereof. In some embodiments, the robot 450 may be configured to operate autonomously, in which embodiments the cameras 31 may be used to gather information used by a processor within the robot 450 to determine a desired path of movement as well as to identify objects to be relocated, examined, or otherwise manipulated using the robotic arm 45 and robotic hand 44. A light 28 may be used to illuminate the area in front of the robotic hand 44 and thus increase the ability of the cameras 31 positioned on the robotic arm 45 to capture a properly exposed image or video feed of that area. As with the robot 440, the robot 450 comprises a plurality of antennas 32 for sending to and/or receiving data from a control station and/or a monitoring station, which may be located remotely.

Another robot 460 according to yet another embodiment of the present disclosure is depicted in FIG. 80. The robot 460 is substantially identical to the robot 450, except that it utilizes a five-wheeled vehicle such as the vehicle 400. Consequently, the robotic arm 45 is attached to a robotic arm mount 57 that in turn attaches to each of the frames 3 on either side of the center wheel 2, rather than to a single rotary mount 43 that is mounted to a single frame 3. The use of five wheels 2 allows for a lower per-wheel distribution of weight of the robotic arm 45 and other components supported by the frames 3 of the robot 460 than with just four wheels.

As shown in FIG. 81, a vehicle 470 is equipped with two pods 46 attached to a frame 3 provided with one or more suspension elements 26. One or both of the pods 46, which may be adapted for carrying, for example, personnel, cargo, or instrumentation, may be equipped with a camera 31 and a light 28 for use in operating the vehicle 470. Two of the four wheels 2 of the vehicle 470 are attached to each pod 46. The operator may be located remotely or in one of the pods 46.

According to another embodiment of the present disclosure depicted in FIG. 82, an all-terrain type vehicle 480 comprises four wheels 2 attached to a frame 3. Affixed to the frame 3 are a seat 47, on which a vehicle operator can sit, and footrests 49 for supporting the operator's feet. Handlebar 48 may be rotatably mounted to the frame 3 and may be used to control rotation of some or all of the wheels 2 around a vertical axis or to control a variation in rotational speed of the left-side wheels 2 and the right-side wheels 2 so as to provide directional control of the vehicle 480. The handlebar 48 may be equipped with a throttle control 51 for use by the operator in controlling acceleration and speed of the vehicle 480, as well as a brake control 50 for use in slowing the vehicle. Suspension elements 26 may be provided to increase the ride comfort for the operator of the vehicle 480.

FIG. 83 depicts a vehicle 490 configured with a single pod 46. As with the vehicle 470 of FIG. 81, the vehicle 490 is equipped with a camera 31, light 28, and sensors 27, which may be used to provide data useful for operation of the vehicle 490. The vehicle 490 may be operated by an operator located within the pod 46, or by a remote operator. As another alternative, the vehicle 490, as with other embodiments of the present disclosure, may be operated autonomously.

Turning now to FIG. 84, a motorized skateboard 500 may comprise a deck 52 to which four wheels 2 are mounted in place of traditional skateboard trucks. In this embodiment, the wheels 2 may be controlled remotely via a Bluetooth or other wireless connection between the wheel 2 and a smart phone or other control device held by the operator. Each wheel 2 may utilize a receiver 5 associated with an antenna 32 for establishing and maintaining such a connection, and each wheel 2 may further comprise a processor and computer-readable memory containing instructions for execution by the processor to enable the processor to receive and respond to commands from the smart phone or other control device. These or similar components may be included in any wheel 2 disclosed herein when the wheel 2 is to be controlled remotely. In some embodiments, the wheels 2 may be controlled instead using a wired controller configured to be held by the user of the skateboard. The skateboard 500 may be steering using skid-steering (e.g. speeding up or slowing down the wheels on one side of the skateboard), leaning-induced wheel rotation (e.g. as in a traditional skateboard), or controller-induced wheel rotation (e.g. using a rack and pinion, or by independent rotation of the wheels).

FIGS. 85-86 depict a tracked vehicle 510 that comprises four vehicles 360 (depicted in FIGS. 54-55). The drive train arms 38 of the front vehicles 360 and of the rear vehicles 360 are connected to a fore and aft drive sprocket 54, respectively. The drive sprockets 54 drive a continuous track 53 located in the center of the four vehicles 360. The continuous track 53 beneficially prevents the tracked vehicle 510 from bottoming out when traveling over rough or uneven terrain.

It is to be understood that any wheel 2 identified in the foregoing description of embodiments of the present disclosure may define an inner volume comprising, among other things, a motor such as the motor 11, a control unit such as the control unit 9, a receiver such as the receiver 5 for receiving wireless signals for controlling the motor via the control unit, and one or more energy sources. Additionally, in a vehicle comprising one or more wheels 2, the wheels 2 may be in wired connection with each other, and/or the wheels 2 may be in wired connection with a control station located on the vehicle (e.g. for steering the vehicle, controlling the motor(s) 11 within the wheel(s) 2, sending or receiving control signals, and the like. Such wired connections may comprise wires running through the vehicle frame.

In some embodiments, steering of multi-wheeled vehicles disclosed herein may be accomplished—in addition to the various steering methods disclosed above—by turning all of the wheels on the vehicle in a coordinated manner, or by turning some of the wheels on the vehicle in a coordinated manner, or by turning one of the wheels on the vehicle. In embodiments without an axle entering a wheel, steering may also be accomplished by independently rotating each wheel. For example, a six-wheeled vehicle could have independent steering allowing each wheel to rotate in any direction. To park in a spot that more traditional vehicles (e.g. cars) could only enter using parallel parking techniques, such a vehicle could simple stop next to the parking spot, rotate its wheels ninety degrees, and drive sideways directly into the parking spot.

Specific details were given in the description to provide a thorough understanding of the embodiments. However, it will be understood by one of ordinary skill in the art that the embodiments may be practiced without these specific details. Additionally, the Figures do not depict well-known features that may be needed to create a working vehicle so as not to obscure the embodiments in unnecessary detail. 

What is claimed is:
 1. A vehicle comprising: a first wheel mounted to an object and being configured to rotate about a first axis of rotation; a second wheel mounted to the object and being configured to rotate about a second axis of rotation that is offset from the first axis of rotation; and wherein at least one of the first wheel and the second wheel comprises a self-contained, self-propelled wheel defining an inner volume and comprising: an axle extending through the inner volume and having one end positioned outside of the inner volume; a propulsion unit supported within the inner volume by the axle and drivingly coupled to the wheel; and a mount positioned within the inner volume and connected to the axle, the mount having a portion extending below an axis of the axle and supporting at least one energy source for powering the propulsion unit, wherein the center of gravity of the vehicle is below the first axis of rotation and the second axis of rotation.
 2. The vehicle of claim 1, wherein the at least one energy source powers a control unit for controlling the propulsion unit.
 3. The vehicle of claim 2, wherein the control unit is an electronic speed control.
 4. The vehicle of claim 1, wherein the portion of the mount extending below the axis supports the at least one energy source.
 5. The vehicle of claim 1, wherein the propulsion unit is drivingly coupled to the at least one of the first wheel and the second wheel via a spur gear.
 6. The vehicle of claim 1, wherein the axle supports the propulsion unit via the mount.
 7. The vehicle of claim 1, further comprising a cover positioned along a boundary of the inner volume.
 8. The vehicle of claim 7, wherein the cover comprises a plurality of apertures that allow air to flow into and out of the inner volume.
 9. The vehicle of claim 7, wherein the axle extends through the cover.
 10. The vehicle of claim 1, wherein the at least one energy source is a battery and the propulsion unit is a motor.
 11. The vehicle of claim 1, further comprising a receiver and an antenna, the receiver configured to receive control signals via the antenna.
 12. A vehicle comprising: a first wheel mounted to an object and being configured to rotate about a first axis of rotation; a second wheel mounted to the object and being configured to rotate about a second axis of rotation that is offset from the first axis of rotation; and wherein the first wheel comprises a tire having a tire tread extending from adjacent a first edge of the first wheel to adjacent a second edge of the first wheel, the tire defining a cylindrical inner volume, the tire and the cylindrical inner volume sharing the first axis of rotation; a cover fixedly positioned at one edge of the cylindrical inner volume; an axle positioned along the first axis of rotation within the inner volume and extending through the cover; a propulsion unit positioned within the inner volume and offset from the axle; and at least one energy source for powering the propulsion unit, the at least one energy source also positioned within the inner volume; wherein a center of gravity of the vehicle is located below the first axis of rotation and the second axis of rotation.
 13. The vehicle of claim 12, further comprising a mount supported by the axle, wherein the propulsion unit and the at least one energy source are secured to the mount.
 14. The vehicle of claim 12, further comprising a receiver and an antenna.
 15. The vehicle of claim 12, wherein the propulsion unit is configured to drive the axle via a spur gear.
 16. The vehicle of claim 12, wherein the cover comprises a plurality of apertures for allowing air to flow through the inner volume.
 17. The vehicle of claim 12, further comprising a control unit for controlling the propulsion unit.
 18. The vehicle of claim 17, wherein the control unit is an electronic speed control, the propulsion unit is a motor, and the at least one energy source is a battery.
 19. The vehicle of claim 12, wherein the propulsion unit and the at least one energy source are positioned underneath the axis.
 20. A self-propelled vehicle, comprising: a first wheel mounted to an object and configured to rotate about a first axis of rotation; a second wheel mounted to the object and configured to rotate about a second axis of rotation that is offset from the first axis of rotation, the second wheel comprising: a tire defining a cylindrical inner volume, the tire and the cylindrical inner volume sharing the second axis of rotation; an axle extending through the cylindrical inner volume along the second axis of rotation; a battery secured within the cylindrical inner volume; a motor secured within the cylindrical inner volume, the motor drivingly coupled to the axle via a spur gear; and a motor control unit secured within the cylindrical inner volume, wherein the center of gravity of the self-propelled vehicle is below the first axis of rotation and the second axis of rotation. 